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Mon, 21 Mar 2022 14:14:20 +0000 From: Mark Kanda To: qemu-devel@nongnu.org Subject: [PATCH v3 5/5] i386/cpu: Free env->xsave_buf in KVM and HVF destory_vcpu_thread routines Date: Mon, 21 Mar 2022 09:14:09 -0500 Message-Id: <20220321141409.3112932-6-mark.kanda@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220321141409.3112932-1-mark.kanda@oracle.com> References: <20220321141409.3112932-1-mark.kanda@oracle.com> X-ClientProxiedBy: DM6PR03CA0096.namprd03.prod.outlook.com (2603:10b6:5:333::29) To SA1PR10MB5841.namprd10.prod.outlook.com (2603:10b6:806:22b::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b5c1df8a-9f47-4c3d-835a-08da0b4517d6 X-MS-TrafficTypeDiagnostic: BN6PR1001MB2258:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: VELyGiVYV7Pm3apq80ac3/0I2ML7nyRc+7nLyQp/uP1X+f6QcH/Xg+4KCsUG46Rr2rAM15zs40MKQLNYJXIpFh7vALc8dHOQlpDf2VEsu3hVWoYSCvn8nk//KhrBrDh3u6by5La75GWUypjEsuHZye5jjB97XbhGMRB/en+dsj873Pv3tjIpRmZWP945byjAN6Sz+xsMdXLMvIjZmGB7J5Y7lQHFjNa/M+tj13vtJKBBGU7GN3/bFX+qyTcuXdczcKr/5DkoDJuaEol+cPk9iz1Q3Y7AYKrN86lNEBeD+VV0I5oZyj+mUD01Q4EgcuwQgkAg0VbT9UsiW3hQe8OKVW5G0n0hzNeaRnNX/0ebPsEU+7PT1WgPqQ+VHl7rydlwz1HNvD1APcOsXJPeH0aMzW/1kuAVXwcWYt6P4LNOdSyynxHVedLR5Y2IJBNJ802TiAceFO0oTUm2WCaNw6hXzvFXoCwOZ3Dr4zA/UVhrR3rbI5iIPnOaRA9CsYLxthdoDVLdfj2OL3MJWmJlxpTcT3GoB9v/XPUNj+rP07IjDESZJw+68+lFWhVLlplCmHrf6p+rkkQf8OtL9+OvYFbWx9FQNLORRCd2NjMwokiogk1uqEO55ksRFHGeogns+GMnVyCRSwHfYn7Tbk7mRwIDjnId8vYdSciHVMB5FpAhHlKQUfwtU7Lepsi+vmBG/6aISZfLKe4qh8yHY3wiIHcDvw== X-Forefront-Antispam-Report: CIP:255.255.255.255; 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envelope-from=mark.kanda@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, richard.henderson@linaro.org, f4bug@amsat.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Create KVM and HVF specific destory_vcpu_thread() routines to free env->xsave_buf. vCPU hotunplug related leak reported by Valgrind: ==132362== 4,096 bytes in 1 blocks are definitely lost in loss record 8,440 of 8,549 ==132362== at 0x4C3B15F: memalign (vg_replace_malloc.c:1265) ==132362== by 0x4C3B288: posix_memalign (vg_replace_malloc.c:1429) ==132362== by 0xB41195: qemu_try_memalign (memalign.c:53) ==132362== by 0xB41204: qemu_memalign (memalign.c:73) ==132362== by 0x7131CB: kvm_init_xsave (kvm.c:1601) ==132362== by 0x7148ED: kvm_arch_init_vcpu (kvm.c:2031) ==132362== by 0x91D224: kvm_init_vcpu (kvm-all.c:516) ==132362== by 0x9242C9: kvm_vcpu_thread_fn (kvm-accel-ops.c:40) ==132362== by 0xB2EB26: qemu_thread_start (qemu-thread-posix.c:556) ==132362== by 0x7EB2159: start_thread (in /usr/lib64/libpthread-2.28.so) ==132362== by 0x9D45DD2: clone (in /usr/lib64/libc-2.28.so) Signed-off-by: Mark Kanda Tested-by: Philippe Mathieu-Daudé Reviewed-by: Philippe Mathieu-Daudé --- accel/hvf/hvf-accel-ops.c | 11 ++++++++++- accel/kvm/kvm-accel-ops.c | 11 ++++++++++- 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c index b23a67881c..bc53890352 100644 --- a/accel/hvf/hvf-accel-ops.c +++ b/accel/hvf/hvf-accel-ops.c @@ -462,12 +462,21 @@ static void hvf_start_vcpu_thread(CPUState *cpu) cpu, QEMU_THREAD_JOINABLE); } +static void hvf_destroy_vcpu_thread(CPUState *cpu) +{ + X86CPU *x86_cpu = X86_CPU(cpu); + CPUX86State *env = &x86_cpu->env; + + g_free(env->xsave_buf); + generic_destroy_vcpu_thread(cpu); +} + static void hvf_accel_ops_class_init(ObjectClass *oc, void *data) { AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); ops->create_vcpu_thread = hvf_start_vcpu_thread; - ops->destroy_vcpu_thread = generic_destroy_vcpu_thread; + ops->destroy_vcpu_thread = hvf_destroy_vcpu_thread; ops->kick_vcpu_thread = hvf_kick_vcpu_thread; ops->synchronize_post_reset = hvf_cpu_synchronize_post_reset; diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c index 5a7a9ae79c..0345a30139 100644 --- a/accel/kvm/kvm-accel-ops.c +++ b/accel/kvm/kvm-accel-ops.c @@ -74,6 +74,15 @@ static void kvm_start_vcpu_thread(CPUState *cpu) cpu, QEMU_THREAD_JOINABLE); } +static void kvm_destroy_vcpu_thread(CPUState *cpu) +{ + X86CPU *x86_cpu = X86_CPU(cpu); + CPUX86State *env = &x86_cpu->env; + + g_free(env->xsave_buf); + generic_destroy_vcpu_thread(cpu); +} + static bool kvm_vcpu_thread_is_idle(CPUState *cpu) { return !kvm_halt_in_kernel(); @@ -89,7 +98,7 @@ static void kvm_accel_ops_class_init(ObjectClass *oc, void *data) AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); ops->create_vcpu_thread = kvm_start_vcpu_thread; - ops->destroy_vcpu_thread = generic_destroy_vcpu_thread; + ops->destroy_vcpu_thread = kvm_destroy_vcpu_thread; ops->cpu_thread_is_idle = kvm_vcpu_thread_is_idle; ops->cpus_are_resettable = kvm_cpus_are_resettable; ops->synchronize_post_reset = kvm_cpu_synchronize_post_reset;